[Documentation] Adding missing events in Matter Linux Air Quality Example (#31856)
* Update README.md
Generate event CarbonMonoxideConcentrationMeasurement
* Update README.md
Generate event `NitrogenDioxideConcentrationMeasurement`
* restyled issue
diff --git a/examples/air-quality-sensor-app/linux/README.md b/examples/air-quality-sensor-app/linux/README.md
index 6641a3e..73139ef 100644
--- a/examples/air-quality-sensor-app/linux/README.md
+++ b/examples/air-quality-sensor-app/linux/README.md
@@ -152,3 +152,16 @@
```
$ echo '{"Name":"CarbonDioxideConcentrationMeasurement","NewValue":400}' > /tmp/chip_air_quality_fifo_<PID>
```
+
+Generate event `CarbonMonoxideConcentrationMeasurement`, to change the CO value.
+
+```
+$ echo '{"Name":"CarbonMonoxideConcentrationMeasurement","NewValue":1}' > /tmp/chip_air_quality_fifo_<PID>
+```
+
+Generate event `NitrogenDioxideConcentrationMeasurement`, to change the NO₂
+value.
+
+```
+$ echo '{"Name":"NitrogenDioxideConcentrationMeasurement","NewValue":1}' > /tmp/chip_air_quality_fifo_<PID>
+```
